dependence , (sometimes U.S.) dependance
n
1 the state or fact of being dependent, esp. for support or help
2 reliance; trust; confidence
3 Rare an object or person relied upon
statistical dependence
n a condition in which two random variables are not independent. X and Y are positively dependent if the conditional probability, P(X|Y), of X given Y is greater than the probability, P(X), of X, or equivalently if P(X&Y) <rab> P(X).P(Y). They are negatively dependent if the inequalities are reversed